M65845AFP 参数 Datasheet PDF下载

M65845AFP

4. Vocal cut

It is a method turned down Lch and Rch input having the same phase and sound.

Low pass cut off frequency fc is determined by a capacitance which connect to pin 36 (vocal cut filter).

It is also having a function which through frequency under vocal level for supplying a lack of low level sound.

R

VC

= 20 kΩ (Typ)

36

C34

fc =

1

2π

•

R

VC

•

C34

at fc = 50 Hz, C34 = 0.15

μF

is determined.

Caution: Inside resistance is changeable one by one which rate is

±30%.

Digital Echo

1. Clock oscillator circuit

This IC incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by

connecting an R

C

for current control pin 32 (CLOCK CONT).

Fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit.

The oscillator frequency fck is following.

fck = 2 MHz (R

C

= 51 kΩ)

DC current

R

C

32

Clock

oscillator

circuit

Clock frequency: fck

Note: The delay time (Td) for echo is determined by the clock frequency (fck).

Delay time = 1/fck

×

24

×

N

(N = the number of memory bits = 16384)

fck = 2 MHz (Rc = 51 kΩ): Delay time = 197 ms

fck = 2.6 MHz (Rc = 39 kΩ): Delay time = 150 ms

fck = 3.9 MHz (Rc = 24 kΩ): Delay time = 100 ms

REJ03F0170-0201 Rev.2.01 Jan 25, 2008

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